[uHuge]

Quick question: Can you split any key, like the password to my LUKS or password manager? Is there any limitation for the content of the file to be split?

[shushcli]

I tested it on some multi-megabyte mp4 files and it still worked well - you can split whatever you want.

The AES keys are the example just because you can update your payload without having to redistribute the shards.